With a group of friends we decided to explore the wireless side of arduino. Searching a bit on google we found a nice and really cheap 2.4GHZ module, the NRF24L01+ module for about 2.60 euros a couple (what the heck do you need just one for?).
NRF24L01+ module
To make it communicate with the other arduino the first thing to do is use the right pinout scheme, which must match the library pinout (of course).
pinouts taken from http://arduino-info.wikispaces.com/Nrf24L01-2.4GHz-HowTo (dupon color coded)
NRF24L01+ pinouts
24L01Pinout-800
We decided to use for our first test the RF24 library (click here for github page), but the devices were not working. Actually they were not communicating correctly. An arduino was transmitting but the other one was not receiving or sometimes it was not sending back the ACK packet.
We’ve spent a bunch of hours, checking dupons, changing arduinos (one of them was actually malfunctioning), changing the radio module and even changing pinouts (who knows… mystic events happening), changing cables.
Then, at 4AM, I decided to start from scratches. Following this (awesome) guide from [maniacbug] I downloaded again the RF24 library, uploaded the GetStarted sketch to the arduinos, connected the radios, and everything was working!
The only reason I can imagine is something about a corrupted library (was from another source) , outdated files, or a divine intervention from Stallman.
Will post again on evolving projects.
Really helpful! My modules were working fine until they suddenly were not communicating. I tried everything conceivable in an Engineer’s mind without luck. Changing the library worked for me, finally! Thank you so much….
I have exactly the same problem. Which library did you replace and with what other library? i’m currently having the rf24 library from tmrh20 installed, giving me problems.
Hi, Everbody, it’s possible utilize Windows 10 + Raspberry pi + Node jS + NRF2401 ?
Hello,
Great and informative article. I am working on arduino project recently. And this concept is very helpful in my project. But i have some doubt, is it really work properly?
Thanks
Beside some problems making it work at the beginning, it’s actually pretty reliable. Please note that anyway some users have encountered problems, which they solved with a daily arduino reboot.
A daily reboot could be attributed to writing serial output while not connected to anything. The serial buffer will fill up and slow it down to a point that it doesn’t work as expected.
Hi
i’m working with NRF24l01 by avr.
but my library don’t work correctly and reset micro suddenly…
i cant test my NRF to send and receive my data…
plz help me…
Hi,
You are awesome. My problem was also same – the faulty library. I took the library from your suggested link, reinstalled the library, and it worked.
One problem though: Initially while the radiodetail was printed it was showing a wrong address for first device (and for both the transceivers), while I started the transmission mode for both, then it showed the correct address for both the radio, and then i switched one end back to receiving mode.
Indoor test result: 30 ft with all wall/door obstacle – pretty good with 1 mbps speed, i will try with 250 kbps, to see if the range gets increased or not.
Thanks again
Debojit
hey u are awesome 😀 I was messing with this thing for 2 days and now I redownloaded from that link, it is working now 🙂 thanks
Thank you! Your avatar the best is. 😀
I had the very same problem. I tried everything, checked the wires, tried different combination didn’t work.
After I found this site, downloaded this RF24 library, renamed the folder to RF24master,
and everything worked fine.
Thanks guys.
Hello, can you show a example of code working with that module please….
i’m trying to make it work but i have problems with that
thanks for your help